From: john stultz <johnstul@us.ibm.com>
To: Roman Zippel <zippel@linux-m68k.org>
Cc: Valdis.Kletnieks@vt.edu, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, Uwe Bugla <uwe.bugla@gmx.de>,
James Bottomley <James.Bottomley@SteelEye.com>
Subject: Re: [PATCH] adjust clock for lost ticks
Date: Sun, 09 Jul 2006 14:25:37 -0700 [thread overview]
Message-ID: <1152480337.21576.17.camel@localhost> (raw)
In-Reply-To: <Pine.LNX.4.64.0607082151400.12900@scrub.home>
On Sat, 2006-07-08 at 22:02 +0200, Roman Zippel wrote:
> A large number of lost ticks can cause an overadjustment of the clock.
> To compensate for this we look at the current error and the larger the
> error already is the more careful we are at adjusting the error.
> As small extra fix reset the error when the clock is set.
>
> Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Roman,
Spent the weekend testing this, dropping 99/100 ticks, and was able to
hold decent sync w/ ntpd. Also the softlockup hang appears resolved as
well (confirmed by Vladis). Thanks for sending this out.
I know its already in -mm, but:
Acked-by: John Stultz <johnstul@us.ibm.com>
-john
next prev parent reply other threads:[~2006-07-09 21:25 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-24 13:19 2.6.17-mm2 Andrew Morton
2006-06-24 15:53 ` 2.6.17-mm2 Rafael J. Wysocki
2006-06-24 17:20 ` 2.6.17-mm2 Dave Jones
2006-06-24 21:34 ` 2.6.17-mm2 Andrew Morton
2006-06-25 8:51 ` 2.6.17-mm2 Rafael J. Wysocki
2006-06-25 10:22 ` 2.6.17-mm2 Andrew Morton
2006-06-25 15:16 ` 2.6.17-mm2 Andrew Morton
2006-06-25 18:23 ` 2.6.17-mm2 Sam Ravnborg
2006-06-25 18:40 ` 2.6.17-mm2 Andrew Morton
2006-06-25 21:21 ` 2.6.17-mm2 Sam Ravnborg
2006-06-30 7:38 ` 2.6.17-mm2 Randy.Dunlap
2006-07-02 10:11 ` 2.6.17-mm2 Russell King
2006-07-02 18:42 ` 2.6.17-mm2 Randy.Dunlap
2006-07-02 18:47 ` 2.6.17-mm2 Arjan van de Ven
2006-07-02 18:47 ` 2.6.17-mm2 Sam Ravnborg
2006-07-03 5:50 ` 2.6.17-mm2 Randy.Dunlap
2006-07-03 13:49 ` 2.6.17-mm2 Russell King
2006-06-25 19:19 ` 2.6.17-mm2 Rafael J. Wysocki
2006-06-26 20:13 ` 2.6.17-mm2 Chandra Seetharaman
2006-06-24 19:41 ` 2.6.17-mm2 Dominik Karall
2006-06-24 21:43 ` 2.6.17-mm2 Andrew Morton
2006-06-25 6:06 ` 2.6.17-mm2 Reuben Farrelly
2006-06-25 9:37 ` 2.6.17-mm2 Barry K. Nathan
2006-06-25 10:29 ` 2.6.17-mm2 Reuben Farrelly
2006-06-25 11:19 ` 2.6.17-mm2 Michal Piotrowski
2006-06-25 11:40 ` 2.6.17-mm2 Andrew Morton
2006-06-25 12:18 ` 2.6.17-mm2 Michal Piotrowski
2006-06-25 16:25 ` 2.6.17-mm2 (NULL pointer dereference) Dominik Karall
2006-06-25 17:18 ` Andrew Morton
2006-06-25 18:11 ` Dominik Karall
2006-06-25 16:47 ` 2.6.17-mm2: no QLA3YYY_NAPI help text Adrian Bunk
2006-06-25 19:32 ` 2.6.17-mm2: BLK_CPQ_CISS_DA=m error Adrian Bunk
2006-06-26 0:41 ` Vivek Goyal
2006-06-25 23:13 ` [-mm patch] make drivers/scsi/pata_it821x.c:it821x_passthru_dev_select() static Adrian Bunk
2006-06-25 23:27 ` Alan Cox
2006-06-27 1:03 ` Jeff Garzik
2006-06-25 23:13 ` [-mm patch] fs/cifs/cifsproto.h: remove #ifdef around small_smb_init_no_tc() prototype Adrian Bunk
2006-06-26 4:05 ` Steven French
2006-06-26 15:17 ` [-mm patch] drivers/scsi/arcmsr/: cleanups Adrian Bunk
2006-06-26 20:27 ` [-mm patch] drivers/md/raid5.c: remove an unused variable Adrian Bunk
2006-06-26 21:41 ` 2.6.17-mm2 hrtimer code wedges at boot? Valdis.Kletnieks
2006-06-26 22:50 ` Valdis.Kletnieks
2006-06-26 23:02 ` john stultz
2006-06-26 23:27 ` Thomas Gleixner
2006-06-27 2:12 ` Valdis.Kletnieks
2006-06-27 5:54 ` Thomas Gleixner
2006-06-27 10:16 ` Roman Zippel
2006-06-27 16:43 ` Valdis.Kletnieks
2006-06-27 17:10 ` Roman Zippel
2006-06-27 17:23 ` Roman Zippel
2006-06-27 19:07 ` Valdis.Kletnieks
2006-06-28 0:07 ` john stultz
2006-06-28 10:35 ` Roman Zippel
2006-06-28 11:44 ` Roman Zippel
2006-06-29 23:07 ` Valdis.Kletnieks
2006-06-30 19:26 ` john stultz
2006-06-30 21:04 ` Valdis.Kletnieks
2006-07-03 1:13 ` Roman Zippel
2006-07-03 1:56 ` Daniel Walker
2006-07-03 2:20 ` Valdis.Kletnieks
2006-07-03 20:08 ` john stultz
2006-07-03 19:59 ` john stultz
2006-07-04 22:21 ` Valdis.Kletnieks
2006-07-05 4:29 ` Valdis.Kletnieks
2006-07-06 0:37 ` Roman Zippel
2006-07-06 0:56 ` john stultz
2006-07-06 6:38 ` Valdis.Kletnieks
2006-07-06 0:51 ` john stultz
2006-07-06 1:12 ` john stultz
2006-07-06 5:43 ` john stultz
2006-07-06 20:33 ` Roman Zippel
2006-07-06 22:05 ` john stultz
2006-07-07 23:16 ` Roman Zippel
2006-07-08 20:02 ` [PATCH] adjust clock for lost ticks Roman Zippel
2006-07-09 21:25 ` john stultz [this message]
2006-06-28 23:41 ` 2.6.17-mm2 hrtimer code wedges at boot? john stultz
2006-06-29 11:24 ` Roman Zippel
2006-06-28 16:54 ` [-mm patch] include/asm-i386/acpi.h should #include <asm/processor.h> Adrian Bunk
2006-06-28 16:54 ` [-mm patch] fix sgivwfb compile Adrian Bunk
2006-06-28 16:54 ` [-mm patch] arch/i386/mach-visws/setup.c: remove dummy function calls Adrian Bunk
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